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Ethylenediamine-modified peach kernel cationic adsorbent and preparation method thereof

A cationic and adsorbent technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of poor adsorption performance of natural peach pits, and achieve low price, large market utilization space, and improved The effect of mild sexual conditioning

Inactive Publication Date: 2018-06-29
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the defect of poor adsorption performance of natural peach pits, to provide a modified peach pit adsorbent for removing high-concentration pigment wastewater discharged from industries such as printing and dyeing, and a preparation method thereof, and the modified peach pit adsorbent The adsorption capacity of pigment is greatly improved, and the raw material of peach pit is rich in source and low in price

Method used

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  • Ethylenediamine-modified peach kernel cationic adsorbent and preparation method thereof
  • Ethylenediamine-modified peach kernel cationic adsorbent and preparation method thereof
  • Ethylenediamine-modified peach kernel cationic adsorbent and preparation method thereof

Examples

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example 1

[0028] This example investigates the adsorption effect of cationic adsorbent prepared by ethylenediamine modified peach pit on methyl orange wastewater, and investigates the adsorption effect of unmodified peach pit powder on methyl orange wastewater.

[0029] At room temperature, take 50 mL of a methyl orange solution with a concentration of 50 mg / L prepared in the laboratory. Weigh 0.2 g of the modified adsorbent in the solution, shake and adsorb at 150 rpm for 4 h, and measure its absorbance at a wavelength of 490 nm. The results showed that after 4 hours of adsorption, the absorbance of the solution decreased from 2.405 to 0.206, the removal rate was 91.43%, and the adsorption capacity was 11.43mg / g.

[0030] Under the same conditions, the absorbance of the unmodified peach stone powder group decreased from 2.405 to 2.299, the removal rate was only 4.407%, and the adsorption capacity was 0.55 mg / g. Compared with the unmodified peach kernel powder, the removal rate of meth...

example 2

[0032] This example investigates the adsorption effect of cationic adsorbent prepared by ethylenediamine modified peach pit on Chrome Black T wastewater, and investigates the adsorption effect of unmodified peach pit powder on Chrome Black T wastewater.

[0033] At room temperature, take 50 mL of chrome black T solution with a concentration of 50 mg / L prepared in the laboratory. Weigh 0.2g of the modified adsorbent and unmodified peach core in the solution, shake and absorb at 150rmp for 4h, then measure the absorbance at a wavelength of 490nm. The results showed that after 4 hours of adsorption, the absorbance of the solution decreased from 0.168 to 0.020, the removal rate was 88.09%, and the adsorption capacity was 11.01mg / g.

[0034] Under the same conditions, the absorbance of the unmodified peach pit powder group decreased from 0.168 to 0.100, the removal rate was only 40.47%, and the adsorption capacity was 5.06 mg / g. Compared with the unmodified peach stone, the peach st...

example 3

[0036] This example investigates the adsorption effect of cationic adsorbent prepared by ethylenediamine modified peach pit on Congo red wastewater, and investigates the adsorption effect of unmodified peach pit powder on Congo red wastewater.

[0037] At room temperature, take 50 mL of the Congo red solution prepared in the laboratory with a concentration of 50 mg / L. Weigh 0.2g of the modified adsorbent and unmodified peach core in the solution, shake and absorb at 150rmp for 4h, then measure the absorbance at a wavelength of 490nm. The results showed that after 4 hours of adsorption, the absorbance of the solution decreased from 0.568 to 0.036, the removal rate was 93.66%, and the adsorption capacity was 11.71mg / g.

[0038] Under the same conditions, the absorbance of the unmodified peach stone powder group decreased from 0.568 to 0.558, the removal rate was only 1.76%, and the adsorption capacity was 0.22 mg / g. Compared with the unmodified peach stone, the removal rate of ...

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Abstract

The invention provides an ethylenediamine-modified peach kernel cationic adsorbent and a preparation method thereof. The preparation method comprises the following steps: crushing washed peach kernels, sieving to obtain powder with the particle size of 50-60 meshes, drying the powder for 24h at 90 DEG C in a drying box, washing for 1h by using sodium hydroxide with the concentration of 0.1 mol / L,washing by water till a neutral state, then drying at 50 DEG C in the drying box, then chemically etherifying the peach kernel powder by using epichlorohydrin, carrying out a reaction for 5h in an alkali epichlorohydrin solution while heating in a water bath with the temperature of 50 DEG C, washing by water till a neutral state is reached, drying overnight at 50 DEG C, finally modifying the etherified peach kernel powder by using ethylenediamine, washing by water till a neutral state is reached, then drying at 50 DEG C to obtain the modified peach kernel cationic adsorbent. Compared with other adsorbents, the ethylenediamine-modified peach kernel cationic adsorbent has the advantages of higher selectivity, a very high anionic pigment removing rate, large adsorption capacity and secondaryrecyclability; in addition, a peach kernel raw material is wide in source and low in price; the ethylenediamine-modified peach kernel cationic adsorbent can be applied to pigment wastewater treatmentin printing and dyeing, food processing and other industries.

Description

technical field [0001] The invention belongs to an adsorbent used in the treatment of pigment wastewater and a preparation technology thereof, in particular to a modified peach pit cationic adsorbent and a preparation method thereof. Background technique [0002] With the rapid development of industry, the sewage discharged from factories shows a trend of diversification, including heavy metal pollution, pigment pollution and organic pollution. For special industries such as food processing and printing and dyeing, a large amount of pigment pollutants will be discharged, which will cause the apparent color change of the pollutant receiving water body and bring discomfort to the public. Therefore, it is urgent to pretreat the pigment pollutants in the factory to reduce the chromaticity of the sewage discharged from the factory, and then it can enter the municipal sewage pipeline. Therefore, it is necessary to develop an economical and effective treatment technology to absorb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28
CPCB01J20/22B01J20/24C02F1/286C02F2101/308
Inventor 兰贵红张名严君华
Owner SOUTHWEST PETROLEUM UNIV
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